So what’s in store this month? Well apart from a fantastic interview with ancient history legend and BBC presenter Professor Richard Miles, we have a lightspeed journey through the galaxy, an in-depth feature on 4G mobile internet, we go head-to-head with Viking warriors, drop the bomb on strategic bombers and get down and dirty with killer germs. Oh, plus the latest and greatest product reviews, a cool experiment showing you how to create anti-gravity water, and an explosive E-book showdown.

So don’t miss out, get your copy of How It Works issue 21, available in all good newsagents and supermarkets. And if you want to enjoy the magazine on your iPad, iPhone, or iPod touch, simply visit the Apple App Store and search for How It Works, then download it for just £1.79. Check it out today!